The Humble Echo (Humble, Tex.), Vol. 28, No. 12, Ed. 1 Thursday, March 23, 1967, newspaper, March 23, 1967; (https://texashistory.unt.edu/ark:/67531/metapth1037179/m1/1/: accessed April 26, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .